event.rb

module Refinery
  module Locations
    class Event < Refinery::Core::BaseModel


      validates :title, :presence => true, :uniqueness => true

      belongs_to :poster, :class_name => '::Refinery::Image'

      belongs_to :event_category
      belongs_to :state
      belongs_to :city
      belongs_to :location
      has_and_belongs_to_many :locations, 
                              :join_table => :refinery_locations_refinery_locations_events, 
                              :foreign_key => "refinery_locations_event_id", 
                              :association_foreign_key => "refinery_location_id", 
                              :class_name => "Refinery::Locations::Location"
      accepts_nested_attributes_for :locations

      # To enable admin searching, add acts_as_indexed on searchable fields, for example:
      #
      #   acts_as_indexed :fields => [:title]

    end
  end
end

form.erb

<div class="container">
  <%= form_for [refinery, :locations_admin, @event], html: {role:'form'} do |f| -%>
    <%= render '/refinery/admin/error_messages',
                :object => @event,
                :include_object_name => true %>

    <div class='form-group'>
      <%= f.label :title -%>
      <%= f.text_field :title, :class => 'form-control' -%>
    </div>

    <div class='form-group'>
      <%= render '/refinery/admin/wysiwyg',
                  :f => f,
                  :fields => [:description, :short_description],
                  :object => "locations/event" -%>
    </div>
    <div class="row">
      <ul class="nav nav-tabs">
        <li class="active"><a data-toggle="tab" href="#event_details">Edit Event Details</a></li>
        <li><a data-toggle="tab" href="#sectionB">Sign-Up Editor</a></li>
      </ul>
      <div class="container location-details">
        <div class="col-md-6 location">
          <div class="tab-content">
            <div id="event_details" class="tab-pane fade in active">

              <div id="custom-location">
                <div class="form-group">
                  <h2>Custom Location<a href="javascript:setNativeLocation('t');" class="btn btn-default pull-right">Native Foods Location?</a></h2>
                </div>

                <div class="form-group">
                  <%= f.label :street_address -%>
                  <%= f.text_field :street_address, :class => 'form-control' -%>
                </div>
                <div class="form-group hidden">
                  <%= f.label :country -%>
                  <%= f.text_field :country, :class => 'form-control', :value => 'US' -%>
                </div>
                <div class="form-group">
                  <%= f.label :state -%>
                  <%= f.select(:state_id, @states.collect {|d| [d.name, d.id] }, {include_blank: true}, {:class => 'form-control'})%>
                </div>
                <div class="form-group">
                  <%= f.label :city -%>
                  <%= f.select(:city_id, @cities.collect {|d| [d.name, d.id] }, {include_blank: true}, {:class => 'form-control'})%>
                </div>
                <div class="form-group">
                  <%= f.label :zip -%>
                  <%= f.text_field :zip, :class => 'form-control' -%>
                </div>
              </div>
              <div id="native-location">
                <div class="form-group">
                  <h2>Location<a href="javascript:setNativeLocation('f');" class="btn btn-default pull-right">Custom Location?</a></h2>
                </div>
                <div class="form-group">
                  <%= f.label 'Native Foods Location' -%>
                  <%= f.select(:location_id, @locations.collect {|d| [d.name, d.id] }, {include_blank: true}, {:class => 'form-control'})%>
                </div>
              </div>
              <div class='field hidden'>
                  <%= f.label :directionslink -%>
                  <%= f.text_field :directionslink -%>
                </div>
                <div class='field hidden'>
                  <%= f.label :is_native_location -%>
                  <%= f.text_field :is_native_location -%>
                </div>
              <br/>
              <div class="form-group">
                <h2>Contact</h2>
              </div>
              <div class="form-group">
                <%= f.label :telephone -%>
                <%= f.text_field :telephone, :class => 'form-control' -%>
              </div>
              <div class="form-group">
                <%= f.label :fax -%>
                <%= f.text_field :fax, :class => 'form-control' -%>
              </div>
              <div class="form-group">
                <%= f.label :email -%>
                <%= f.text_field :email, :class => 'form-control' -%>
              </div>
              <br/>
              <div class="form-group">
                <h2>When</h2>
              </div>
              <div class='form-group'>
                <%= f.label :time_start -%>
                <%= f.time_select :time_start, {}, {:class => 'form-control select'} -%>
              </div>

              <div class='form-group'>
                <%= f.label :time_end -%>
                <%= f.time_select :time_end, {}, {:class => 'form-control select'} -%>
              </div>

              <div class='form-group'>
                <%= f.label :date -%>
                <%= f.date_select :date, {}, {:class => 'form-control select'} -%>
              </div>

              <div class='form-group'>
                <%= f.label :posting_date -%>
                <%= f.date_select :posting_date, {}, {:class => 'form-control select'} -%>
              </div>
            </div>
            <div id="sectionB" class="tab-pane fade">
              <p>Section B content…</p>
            </div>
          </div>
        </div>
        <div class="col-md-6 previewMap">
          <div class="form-group"><h2>Preview Map</h2></div>
          <div class="form-group">
            <%= image_tag(@event.directionslink, :id => "event_mappreview", :alt => "map preview", :width => 400, :height => 300)-%>
          </div>
          <div class='form-group'>
            <%= f.label :poster -%>
            <%= render '/refinery/admin/image_picker',
                       :f => f,
                       :field => :poster_id,
                       :image => @event.poster,
                       :toggle_image_display => false -%>
        
          </div>
          <div class="form-group">
            <%= f.label "Associated Locations" -%>
            <%= select_tag "related_locations", options_from_collection_for_select(@locations, :id, :name), prompt: "Select location" , class: 'form-control'-%>
          </div>
          <div class="form-group">
            <%= f.fields_for :locations do |ff| %>
              <%= ff.check_box :name %>
              <%= ff.label :name, ff.object.name %>
            <% end %>
          </div>
        </div>
      </div>
    </div>

    <%= render '/refinery/admin/form_actions', :f => f,
               :continue_editing => false,
               :delete_title => t('delete', :scope => 'refinery.events.admin.events.event'),
               :delete_confirmation => t('message', :scope => 'refinery.admin.delete', :title => @event.title) -%> 
  <% end -%>
</div>

<% content_for :javascripts do -%>
  <script>
    $(document).ready(function(){
      page_options.init(false, '', '');
    });

    $(function(){
      window.fields = {
        addressInput : $('#event_street_address'),
        countryInput : $('#event_country'),
        stateInput : $('#event_state_id'),
        cityInput : $('#event_city_id'),
        zipInput : $('#event_zip'),
        mapPreview : $('#event_mappreview'),
        addressField : $('#event_directionslink')
      };

      $.each(fields, function(index, item) {
        item.on('change', previewMapManager.setMapPreview);
      });

      window.setNativeLocation= function (isNative){
        if(isNative == 't'){
          $('#custom-location').hide();
          $('#native-location').show();
        } else {
          $('#native-location').hide();
          $('#custom-location').show();
        }
        $('#event_is_native_location').val(isNative);
        
      }

      setNativeLocation($('#event_is_native_location').val());
      
    });
  </script>
<% end -%>

location.rb

module Refinery
  module Locations
    class Location < Refinery::Core::BaseModel
      self.table_name = 'refinery_locations'


      validates :name, :presence => true, :uniqueness => true

      belongs_to :picture, :class_name => '::Refinery::Image'

      belongs_to :state
      belongs_to :city
      has_and_belongs_to_many :events,  
                              :join_table => :refinery_locations_refinery_locations_events, 
                              :foreign_key => "refinery_location_id", 
                              :association_foreign_key => "refinery_locations_event_id", 
                              :class_name => "Refinery::Locations::Event"

      # To enable admin searching, add acts_as_indexed on searchable fields, for example:
      #
      #   acts_as_indexed :fields => [:title]

    end
  end
end

tables.rb

create_table "refinery_locations", force: true do |t|
  t.string   "name"
  t.integer  "position"
  t.datetime "created_at"
  t.datetime "updated_at"
  t.text     "description"
  t.integer  "picture_id"
  t.string   "country"
  t.string   "address"
  t.string   "zip"
  t.string   "hours"
  t.string   "telephone"
  t.string   "fax"
  t.string   "email"
  t.string   "directionslink"
  t.text     "about"
  t.integer  "state_id"
  t.integer  "city_id"
end

create_table "refinery_locations_events", force: true do |t|
  t.string   "title"
  t.text     "description"
  t.time     "time_start"
  t.time     "time_end"
  t.date     "date"
  t.integer  "poster_id"
  t.date     "posting_date"
  t.integer  "event_category_id"
  t.integer  "position"
  t.datetime "created_at"
  t.datetime "updated_at"
  t.string   "location_name"
  t.string   "street_address"
  t.string   "country"
  t.integer  "state_id"
  t.integer  "city_id"
  t.string   "zip"
  t.string   "telephone"
  t.string   "fax"
  t.string   "email"
  t.integer  "location_id"
  t.string   "directionslink"
  t.boolean  "is_native_location"
  t.text     "short_description"
end

create_table "refinery_locations_refinery_locations_events", id: false, force: true do |t|
  t.integer "refinery_location_id",        null: false
  t.integer "refinery_locations_event_id", null: false
end